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Lab results can add useful context to how you feel, but no single marker explains readiness or fatigue on its own. Reference intervals vary by laboratory, method, age, sex, health history, and clinical situation. Use your report's range and discuss questions with a qualified clinician.
Ferritin is a protein that stores iron. A ferritin test can help a clinician assess iron stores alongside symptoms and other tests. Both low and high results can have several causes, so the number should not be used by itself to start iron or change treatment. MedlinePlus: Ferritin Blood Test.
The commonly used 25-hydroxyvitamin D test measures vitamin D status. Testing is not routinely recommended for everyone, and interpretation depends on why the test was ordered. A clinician can help decide whether a result needs follow-up. MedlinePlus: Vitamin D Test.
TSH is a signal involved in thyroid function. An unusual result may lead a clinician to consider symptoms, medicines, pregnancy status, and other thyroid tests before drawing a conclusion. MedlinePlus: TSH Test.
Vitamin B tests can measure one or more B vitamins, including B12, in blood or urine. The reason for testing, symptoms, diet, medicines, and other results all affect interpretation. MedlinePlus: Vitamin B Test.
Urja can import supported lab results from Apple Health, a text-based PDF, or manual entry, then show marker history and educational context. It does not diagnose a condition, replace your laboratory's reference interval, or tell you to start a supplement or treatment. Optional reminders can help you remember a goal or a clinician-planned follow-up.
Urja combines Apple Watch signals with optional lab history and educational context. Join the beta →
Educational wellness information only — not a diagnosis or medical advice. Discuss lab results, supplements, and treatment changes with a qualified clinician.